Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($)	3 Months Ended	12 Months Ended
Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill, beginning balance		$ 66,062,000	$ 66,062,000
Impairment			0	$ (2,350,000)
Goodwill, ending balance		66,062,000	66,062,000	66,062,000
Banking [Member]
Goodwill [Line Items]
Goodwill, beginning balance		48,536,000	48,536,000
Impairment	$ 0			0
Goodwill, ending balance		48,536,000	48,536,000	48,536,000
All Other [Member]
Goodwill [Line Items]
Goodwill, beginning balance		17,526,000	17,526,000
Goodwill, ending balance		$ 17,526,000	$ 17,526,000	$ 17,526,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration